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blender-archive/source/blender/functions/FN_multi_function_network_evaluation.hh
Jacques Lucke 01b6c4b32b Functions: make multi functions smaller and cheaper to construct in many cases
Previously, the signature of a `MultiFunction` was always embedded into the function.
There are two issues with that. First, `MFSignature` is relatively large, because it contains
multiple strings and vectors. Secondly, constructing it can add overhead that should not
be necessary, because often the same signature can be reused.

The solution is to only keep a pointer to a signature in `MultiFunction` that is set during
construction. Child classes are responsible for making sure that the signature lives
long enough. In most cases, the signature is either embedded into the child class or
it is allocated statically (and is only created once).
2021-03-22 12:01:07 +01:00

63 lines
2.1 KiB
C++

/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
/** \file
* \ingroup fn
*/
#include "FN_multi_function_network.hh"
namespace blender::fn {
class MFNetworkEvaluationStorage;
class MFNetworkEvaluator : public MultiFunction {
private:
MFSignature signature_;
Vector<const MFOutputSocket *> inputs_;
Vector<const MFInputSocket *> outputs_;
public:
MFNetworkEvaluator(Vector<const MFOutputSocket *> inputs, Vector<const MFInputSocket *> outputs);
void call(IndexMask mask, MFParams params, MFContext context) const override;
private:
using Storage = MFNetworkEvaluationStorage;
void copy_inputs_to_storage(MFParams params, Storage &storage) const;
void copy_outputs_to_storage(
MFParams params,
Storage &storage,
Vector<const MFInputSocket *> &outputs_to_initialize_in_the_end) const;
void evaluate_network_to_compute_outputs(MFContext &global_context, Storage &storage) const;
void evaluate_function(MFContext &global_context,
const MFFunctionNode &function_node,
Storage &storage) const;
bool can_do_single_value_evaluation(const MFFunctionNode &function_node, Storage &storage) const;
void initialize_remaining_outputs(MFParams params,
Storage &storage,
Span<const MFInputSocket *> remaining_outputs) const;
};
} // namespace blender::fn